Text and Data Mining valid from 2017-11-11
Received: 4 December 2016
Revised: 24 August 2017
Accepted: 23 October 2017
First Online: 11 November 2017
Compliance with ethical standards
: The corresponding authors state on behalf of all other authors that none of the authors has a potential conflict of interests, received any grants or fees concerning any part of this study.
: The authors have used only anonymous radiographic data without disclosures of any patients’ data. The ethical board of the institution had waived the need for formal IRB approval or patients’ consent to conduct this study.